# SUBPS — Subtract Packed Single Precision Floating-Point Values

Opcode/Instruction | Op/E n | 64/32 bit Mode Support | CPUID Feature Flag | Description
--- | --- | --- | --- | ---
NP 0F 5C /r SUBPS xmm1, xmm2/m128 | A | V/V | SSE | Subtract packed single precision floating-point values in xmm2/mem from xmm1 and store result in xmm1.
VEX.128.0F.WIG 5C /r VSUBPS xmm1,xmm2, xmm3/m128 | B | V/V | AVX | Subtract packed single precision floating-point values in xmm3/mem from xmm2 and stores result in xmm1.
VEX.256.0F.WIG 5C /r VSUBPS ymm1, ymm2, ymm3/m256 | B | V/V | AVX | Subtract packed single precision floating-point values in ymm3/mem from ymm2 and stores result in ymm1.
EVEX.128.0F.W0 5C /r VSUBPS xmm1 {k1}{z}, xmm2, xmm3/m128/m32bcst | C | V/V | AVX512VL AVX512F | Subtract packed single precision floating-point values from xmm3/m128/m32bcst to xmm2 and stores result in xmm1 with writemask k1.
EVEX.256.0F.W0 5C /r VSUBPS ymm1 {k1}{z}, ymm2, ymm3/m256/m32bcst | C | V/V | AVX512VL AVX512F | Subtract packed single precision floating-point values from ymm3/m256/m32bcst to ymm2 and stores result in ymm1 with writemask k1.
EVEX.512.0F.W0 5C /r VSUBPS zmm1 {k1}{z}, zmm2, zmm3/m512/m32bcst{er} | C | V/V | AVX512F | Subtract packed single precision floating-point values in zmm3/m512/m32bcst from zmm2 and stores result in zmm1 with writemask k1.

## Instruction Operand Encoding ¶

Op/En | Tuple Type | Operand 1 | Operand 2 | Operand 3 | Operand 4
--- | --- | --- | --- | --- | ---
A | N/A | ModRM:reg (r, w) | ModRM:r/m (r) | N/A | N/A
B | N/A | ModRM:reg (w) | VEX.vvvv (r) | ModRM:r/m (r) | N/A
C | Full | ModRM:reg (w) | EVEX.vvvv (r) | ModRM:r/m (r) | N/A

## Description ¶

Performs a SIMD subtract of the packed single precision floating-point values in the second Source operand from the First Source operand, and stores the packed single precision floating-point results in the destination operand.

VEX.128 and EVEX.128 encoded versions: The second source operand is an XMM register or an 128-bit memory location. The first source operand and destination operands are XMM registers. Bits (MAXVL-1:128) of the corresponding destination register are zeroed.

VEX.256 and EVEX.256 encoded versions: The second source operand is an YMM register or an 256-bit memory location. The first source operand and destination operands are YMM registers. Bits (MAXVL-1:256) of the corresponding destination register are zeroed.

EVEX.512 encoded version: The second source operand is a ZMM register, a 512-bit memory location or a 512-bit vector broadcasted from a 32-bit memory location. The first source operand and destination operands are ZMM registers. The destination operand is conditionally updated according to the writemask.

128-bit Legacy SSE version: The second source can be an XMM register or an 128-bit memory location. The destination is not distinct from the first source XMM register and the upper Bits (MAXVL-1:128) of the corresponding register destination are unmodified.

## Operation ¶

### VSUBPS (EVEX Encoded Versions When SRC2 Operand is a Vector Register) ¶

    (KL, VL) = (4, 128), (8, 256), (16, 512)
    IF (VL = 512) AND (EVEX.b = 1)
        THEN
            SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(EVEX.RC);
        ELSE
            SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(MXCSR.RC);
    FI;
    FOR j := 0 TO KL-1
        i := j * 32
        IF k1[j] OR *no writemask*
            THEN DEST[i+31:i] := SRC1[i+31:i] - SRC2[i+31:i]
        ELSE
            IF *merging-masking* ; merging-masking
                THEN *DEST[31:0] remains unchanged*
                ELSE ; zeroing-masking
                    DEST[31:0] := 0
            FI;
        FI;
    ENDFOR;
    DEST[MAXVL-1:VL] := 0

### VSUBPS (EVEX Encoded Versions When SRC2 Operand is a Memory Source) ¶

    (KL, VL) = (4, 128), (8, 256),(16, 512)
    FOR j := 0 TO KL-1
        i := j * 32
        IF k1[j] OR *no writemask* THEN
                IF (EVEX.b = 1)
                    THEN DEST[i+31:i] := SRC1[i+31:i] - SRC2[31:0];
                    ELSE DEST[i+31:i] := SRC1[i+31:i] - SRC2[i+31:i];
                FI;
        ELSE
            IF *merging-masking* ; merging-masking
                THEN *DEST[31:0] remains unchanged*
                ELSE ; zeroing-masking
                    DEST[31:0] := 0
            FI;
        FI;
    ENDFOR;
    DEST[MAXVL-1:VL] := 0

### VSUBPS (VEX.256 Encoded Version) ¶

    DEST[31:0] := SRC1[31:0] - SRC2[31:0]
    DEST[63:32] := SRC1[63:32] - SRC2[63:32]
    DEST[95:64] := SRC1[95:64] - SRC2[95:64]
    DEST[127:96] := SRC1[127:96] - SRC2[127:96]
    DEST[159:128] := SRC1[159:128] - SRC2[159:128]
    DEST[191:160] := SRC1[191:160] - SRC2[191:160]
    DEST[223:192] := SRC1[223:192] - SRC2[223:192]
    DEST[255:224] := SRC1[255:224] - SRC2[255:224].
    DEST[MAXVL-1:256] := 0

### VSUBPS (VEX.128 Encoded Version) ¶

    DEST[31:0] := SRC1[31:0] - SRC2[31:0]
    DEST[63:32] := SRC1[63:32] - SRC2[63:32]
    DEST[95:64] := SRC1[95:64] - SRC2[95:64]
    DEST[127:96] := SRC1[127:96] - SRC2[127:96]
    DEST[MAXVL-1:128] := 0

### SUBPS (128-bit Legacy SSE Version) ¶

    DEST[31:0] := SRC1[31:0] - SRC2[31:0]
    DEST[63:32] := SRC1[63:32] - SRC2[63:32]
    DEST[95:64] := SRC1[95:64] - SRC2[95:64]
    DEST[127:96] := SRC1[127:96] - SRC2[127:96]
    DEST[MAXVL-1:128] (Unmodified)

## Intel C/C++ Compiler Intrinsic Equivalent ¶

    VSUBPS __m512 _mm512_sub_ps (__m512 a, __m512 b);

    VSUBPS __m512 _mm512_mask_sub_ps (__m512 s, __mmask16 k, __m512 a, __m512 b);

    VSUBPS __m512 _mm512_maskz_sub_ps (__mmask16 k, __m512 a, __m512 b);

    VSUBPS __m512 _mm512_sub_round_ps (__m512 a, __m512 b, int);

    VSUBPS __m512 _mm512_mask_sub_round_ps (__m512 s, __mmask16 k, __m512 a, __m512 b, int);

    VSUBPS __m512 _mm512_maskz_sub_round_ps (__mmask16 k, __m512 a, __m512 b, int);

    VSUBPS __m256 _mm256_sub_ps (__m256 a, __m256 b);

    VSUBPS __m256 _mm256_mask_sub_ps (__m256 s, __mmask8 k, __m256 a, __m256 b);

    VSUBPS __m256 _mm256_maskz_sub_ps (__mmask16 k, __m256 a, __m256 b);

    SUBPS __m128 _mm_sub_ps (__m128 a, __m128 b);

    VSUBPS __m128 _mm_mask_sub_ps (__m128 s, __mmask8 k, __m128 a, __m128 b);

    VSUBPS __m128 _mm_maskz_sub_ps (__mmask16 k, __m128 a, __m128 b);

## SIMD Floating-Point Exceptions ¶

Overflow, Underflow, Invalid, Precision, Denormal.

## Other Exceptions ¶

VEX-encoded instructions, see Table 2-19, “Type 2 Class Exception Conditions.”

EVEX-encoded instructions, see Table 2-46, “Type E2 Class Exception Conditions.”